o add vusb

tools/vusb/examples/hid-custom-rq/Readme.txt

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+This is the Readme file for the hid-custom-rq example. This is basically the
+same as the custom-class example, except that the device conforms to the USB
+HID class.
+
+
+WHAT IS DEMONSTRATED?
+=====================
+This example demonstrates how custom requests can be sent to devices which
+are otherwise HID compliant. This mechanism can be used to prevent the
+"driver CD" dialog on Windows and still control the device with libusb-win32.
+It can also be used to extend the functionality of the USB class, e.g. by
+setting parameters.
+
+Please note that you should install the filter version of libusb-win32 to
+take full advantage or this mode. The device driver version only has access
+to devices which have been registered for it with a *.inf file. The filter
+version has access to all devices.
+
+
+MORE INFORMATION
+================
+For information about how to build this example and how to use the command
+line tool see the Readme file in the custom-class example.
+
+
+----------------------------------------------------------------------------
+(c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH.
+http://www.obdev.at/